Pick the right tool for the job, I'd say. On future touch screen laptops (and desktops!), Shell will be quite nice, and it surely will work on tablets (once they fix the applications). And it's quite easy to learn to work with it, too. I think it'll do well at Point-Of-Sales and Kiosk systems, schools probably too, once they make a decent framework like KDE's Kiosk for managing what the user can and can't do.
It just isn't particularly good at replacing GNOME 2, but there are others doing that. Mate continues GNOME 2 and XFCE and KDE both can provide a very-close-to-GNOME-2 experience. With XFCE adding less resource usage and KDE adding an number of efficiency features. Both are great for Getting Things Done (the use case where GNOME Shell imho fails at).
Seeing the comments about Apple going for more mainstream users I'm guessing Shell is going in the same direction and it's inevitable that there is some loss. And I don't mind, it's good somebody is doing it and while at it, GNOME devs are certainly innovating and trying new things. Points for that.